Aimed at key links of tank production process-welding

researched laser cleaning technology before welding

reduced the remainder by surface treatment before welding;researched nearly closed sanding technology for welding at the same time

improved the suction effect of welding leakage sanding

reduced remainder residue. The results show that:there are no aluminum dust and other dust in the laser cleaning process before welding

when the cleaning speed is at 400～600 mm/min

the weld appearance and internal quality is good

and The tensile strength is consistent with the weld joints by manual scraping;nearly closed sanding technology after welding

effectively suck the remainder from welding leakage sanding

no remainder visible to human eye after sanding.